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Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

This extraordinary book shows in a simple way how the Sun's light and warmth affect Earth. Children will be amazed to learn that the Sun is actually a star, and that its position and distance from Earth cause day and night as well as changing weather and the seasons. Simple, brief explanations also describe Earth's rotation and tilt, Earth's two poles and the equator, a solar eclipse, how plants make food from sunlight, and how sunlight colors our world.

Describes the raid on an armory in Harpers Ferry, West Virginia by John Brown, an abolistionist, in 1859. In graphic novel format.

Los creadores de la serie Dino historias nos traen ahora Animales prehistóricos. Hace muchos años, en América rondaba un vicioso depredador: el tigre dientes de sable. En formato de cómic, este libro sigue los pasos de un dientes de sable macho que ha sido desterrado de su manada. Desde cómo eran las dinámicas de las manadas y como sobrevivían los exiliados, Dientes de sable muestra cómo podría haber sido la vida de estos grandes y pesados depredadores extintos.